Leak-proof three-valve group

Abstract

The utility model relates to the technical field of valves, in particular to a leakproof three-valve group, a main body comprises a first valve body and a second valve body, a first flow channel and a second flow channel which are communicated with each other are arranged in the first valve body, and a high-pressure valve and a low-pressure valve are arranged on the first valve body and used for communicating or blocking the first flow channel. A third flow channel is arranged in the second valve body, the balance valve is arranged on the second valve body and used for communicating or blocking the third flow channel, the first valve body and the second valve body are connected through a connecting assembly, and the connecting assembly comprises a first fixing piece arranged on the first valve body and a second fixing piece arranged on the second valve body. A first fixing piece and a second fixing piece are arranged on the first valve body, a spring is arranged between the first fixing piece and the second fixing piece, the spring enables the first valve body and the second valve body to move towards the direction close to each other through elastic force, and when the first valve body and the second valve body are connected, the second flow channel and the third flow channel are communicated. The device has the advantage of leakage prevention.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a three-valve group with anti-leakage function. Background Art

[0002] The three-valve group consists of three interconnected valves. According to the functions of each valve in the system, it can be divided into: the high-pressure valve on the left, the low-pressure valve on the right, and the balance valve in the middle. The three-valve group is used in combination with a differential transmitter, and its functions are to connect or disconnect the positive and negative pressure measurement chambers from the pressure tapping point; or to disconnect or connect the positive and negative pressure measurement chambers.

[0003] The sealing performance is an important technical performance index of the three-valve group. The three-valve group in the prior art has the problem of poor sealing performance, which increases the risk of leakage as the working time increases. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the disadvantages and deficiencies existing in the prior art, and to provide a three-valve group with anti-leakage function. The utility model improves the connection strength between the first valve body and the second valve body through the connection component, reduces the gap, improves the sealing performance, and prevents leakage.

[0005] The technical solution adopted by the utility model is as follows: a three-valve group with anti-leakage function, including a main body, a high-pressure valve, a low-pressure valve and a balance valve. The main body includes a first valve body and a second valve body. The first valve body is internally provided with a first flow channel and a second flow channel that are interconnected. The high-pressure valve and the low-pressure valve are both arranged on the first valve body for connecting or blocking the first flow channel. The second valve body is internally provided with a third flow channel. The balance valve is arranged on the second valve body for connecting or blocking the third flow channel. The first valve body and the second valve body are connected through a connection component. The connection component includes a first fixing member arranged on the first valve body and a second fixing member arranged on the second valve body. A spring is arranged between the first fixing member and the second fixing member. The spring moves the first valve body and the second valve body towards each other by elastic force. When the first valve body and the second valve body are connected, the second flow channel and the third flow channel are connected.

[0006] The first fixing member includes a threaded member and a movable member that is slidably connected to the threaded member. The threaded member is threadedly connected to the first valve body. The threaded member is recessed with a groove for the movable member to slide. One end of the spring abuts against the movable member and the other end abuts against the second fixing member.

[0007] Both the end of the movable member and the end of the second fixing member that abut against the spring are recessed with arc grooves.

[0008] The threaded member is also provided with a serrated surface. The first valve body is provided with a tooth-shaped surface adapted to the serrated surface.

[0009] The connecting component further includes an end cover member threadedly connected to the threaded member. The end cover member is threadedly connected with an adjusting member that abuts against the movable member. A knob is provided at one end of the adjusting member away from the movable member.

[0010] One end of the second fixing member abuts against the inner wall of the threaded member and is provided with a sealing ring.

[0011] The second fixing member is of a Z-shaped structure. One end of the second fixing member is fixedly connected to the second valve body through a bolt assembly, and the other end of the second fixing member abuts against the spring.

[0012] The beneficial effects of the present utility model are as follows: The present utility model improves the connection strength between the first valve body and the second valve body through the connecting component, reduces the gap, improves the sealing performance, prevents leakage. The connecting component includes the first fixing member, the second fixing member and the spring. The first fixing member and the second fixing member are connected in an inverted manner. The spring pushes the first fixing member installed on the first valve body and the second fixing member installed on the second valve body in opposite directions by elastic force. Correspondingly, the first valve body and the second valve body are subjected to the thrust of approaching each other, so that the first valve body and the second valve body are kept tightly connected. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, obtaining other drawings based on these drawings without creative efforts still belongs to the scope of the present utility model.

[0014] Figure 1 It is a cross-sectional schematic view of a three-valve group for preventing leakage of the present utility model;

[0015] Figure 2 It is Figure 1 a partial enlarged structural schematic view of part A in

[0016] Figure 3 It is a cross-sectional schematic view of another perspective of the present utility model;

[0017] In the figure, 1 - high-pressure valve, 2 - low-pressure valve, 3 - balance valve, 4 - first valve body, 5 - second valve body, 6 - first flow channel, 7 - second flow channel, 8 - third flow channel, 9 - first fixing member, 10 - second fixing member, 11 - spring, 12 - threaded member, 13 - movable member, 14 - groove, 15 - arc groove, 16 - serrated surface, 17 - end cover member, 18 - adjusting member, 19 - knob, 20 - sealing ring, 21 - bolt assembly. Detailed Embodiments

[0018] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] It should be noted that all the expressions using "first" and "second" in the embodiments of the present utility model are used to distinguish two entities or parameters with the same name but different identities. It can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present utility model. This will not be elaborated one by one in the subsequent embodiments.

[0020] The terms of direction and position mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "side", etc., are only with reference to the direction or position of the accompanying drawings. Therefore, the terms of direction and position used are for explaining and understanding the present utility model, rather than a limitation on the protection scope of the present utility model.

[0021] As Figures 1 to 3 shown, an embodiment of the present utility model is a three-valve group with anti-leakage function, which includes a main body, a high-pressure valve 1, a low-pressure valve 2 and a balance valve 3. The main body includes a first valve body 4 and a second valve body 5. A first flow channel 6 and a second flow channel 7 that communicate with each other are provided inside the first valve body 4. The high-pressure valve 1 and the low-pressure valve 2 are both arranged on the first valve body 4 to connect or block the first flow channel 6. A third flow channel 8 is provided inside the second valve body 5. The balance valve 3 is arranged on the second valve body 5 to connect or block the third flow channel 8. The first valve body 4 and the second valve body 5 are connected by a connection component. The connection component includes a first fixing member 9 arranged on the first valve body 4 and a second fixing member 10 arranged on the second valve body 5. A spring 11 is arranged between the first fixing member 9 and the second fixing member 10. The spring 11 moves the first valve body 4 and the second valve body 5 towards each other by elastic force. When the first valve body 4 and the second valve body 5 are connected, the second flow channel 7 and the third flow channel 8 are communicated.

[0022] The beneficial effects of such a setting are as follows. The present utility model improves the connection strength between the first valve body and the second valve body through the connection component, reduces the gaps, improves the sealing performance and prevents leakage. The connection component is the first fixing member, the second fixing member and the spring. The first fixing member and the second fixing member are connected in an inverted manner. The spring pushes the first fixing member installed on the first valve body and the second fixing member installed on the second valve body in opposite directions by elastic force. Correspondingly, the first valve body and the second valve body are subjected to the thrust towards each other, so that the first valve body and the second valve body are kept tightly connected.

[0023] Further setting: The first fixing member 9 includes a threaded member 12 and a movable member 13 slidably connected to the threaded member 12. The threaded member 12 is threadedly connected to the first valve body 4. A groove 14 for the movable member 13 to slide is recessed in the threaded member 12. One end of the spring 11 abuts against the movable member 13 and the other end abuts against the second fixing member 10.

[0024] The beneficial effects of such a setting are as follows: By installing the threaded member on the first valve body, and the movable member abuts against the spring, with the movable member slidably connected in the groove of the threaded member, the movable member can reciprocally slide under the action of the spring, providing a certain compression range for the spring. By moving the movable member, the compression amount of the spring can be adjusted, and the connection strength between the first valve body and the second valve body is affected.

[0025] Further setting: Arc grooves 15 are recessed at one ends of the movable member 13 and the second fixing member 10 that abut against the spring 11.

[0026] The beneficial effects of such a setting are as follows: The arc grooves fit more closely with the spring, increasing the force-bearing area of the spring and preventing the spring from twisting and failing.

[0027] Further setting: A serrated surface 16 is further provided on the threaded member 12, and the first valve body 4 is provided with a tooth-shaped surface adapted to the serrated surface 16.

[0028] The beneficial effects of such a setting are as follows: Through the cooperation of the serrated surface and the tooth-shaped surface, the force-bearing area between the first valve body and the threaded member is increased, and the friction between the two is also increased, thereby increasing the connection strength between the two.

[0029] Further setting: The connection assembly further includes an end cap member 17 threadedly connected to the threaded member 12. The end cap member 17 is threadedly connected to an adjusting member 18 that abuts against the movable member 13. A knob 19 is provided at one end of the adjusting member 18 away from the movable member 13.

[0030] The beneficial effects of such a setting are as follows: The end cap covering the outside of the first fixing member can block dust from entering, preventing the dust from affecting each component. And a threadedly connected adjusting member is installed on the end cap. The adjusting member can be rotated by the knob. When rotating the adjusting member, the abutting movable member can be driven to move, thereby controlling the compression amount of the spring, which has the advantage of convenient adjustment. When the working time of the first valve body and the second valve body increases, the connection strength will decrease. By rotating the adjusting member, the two are tightly abutted against each other again.

[0031] Further setting: One end of the second fixing member 10 abuts against the inner wall of the threaded member 12, and a sealing ring 20 is provided.

[0032] The beneficial effects of such a setting are as follows. After the second fixing member abuts against the threaded member, a space communicating with the gap between the first valve body and the second valve body is formed between the two. The space is used to store the medium leaked from the gap, playing a role in secondary anti-leakage protection. A sealing ring is installed between the two to prevent the medium from contacting the spring and affecting the performance of the spring.

[0033] Furthermore, the second fixing member 10 is of a Z-shaped structure. One end of the second fixing member 10 is fixedly connected to the second valve body 5 through a bolt assembly 21, and the other end of the second fixing member 10 abuts against the spring 11.

[0034] The beneficial effects of such a setting are as follows. The second fixing member of the Z-shaped structure has the advantage of high structural strength and is fixedly connected to the second valve body through a bolt assembly, with a large stress area, ensuring that the elastic force of the spring is well converted into a thrust force, thereby ensuring the tight connection between the first valve body and the second valve body.

[0035] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A leakage-proof three-valve group, comprising a main body, a high-pressure valve (1), a low-pressure valve (2) and a balancing valve (3), characterized in that: The main body comprises a first valve body (4) and a second valve body (5); a first flow channel (6) and a second flow channel (7) which are interconnected are provided inside the first valve body (4); the high-pressure valve (1) and the low-pressure valve (2) are both arranged on the first valve body (4) for connecting or blocking the first flow channel (6); a third flow channel (8) is provided inside the second valve body (5); the balancing valve (3) is arranged on the second valve body (5) for connecting or blocking the third flow channel (8); the first valve body (4) and the second valve body (5) are connected via a connecting assembly; the connecting assembly comprises a first fixing member (9) arranged on the first valve body (4) and a second fixing member (10) arranged on the second valve body (5); a spring (11) is arranged between the first fixing member (9) and the second fixing member (10); the spring (11) moves the first valve body (4) and the second valve body (5) in a direction of approaching each other through elastic force; when the first valve body (4) and the second valve body (5) are connected, the second flow channel (7) and the third flow channel (8) are connected.

2. The anti-leakage three-valve group according to claim 1, characterized in that: The first fixing member (9) comprises a threaded member (12) and a movable member (13) slidably connected to the threaded member (12); the threaded member (12) is threadedly connected to the first valve body (4); the threaded member (12) is recessed with a groove (14) for the movable member (13) to slide; one end of the spring (11) abuts against the movable member (13) and the other end abuts against the second fixing member (10).

3. The anti-leakage three-valve group according to claim 2, characterized in that: The movable member (13) and the second fixed member (10) are both recessed with arc grooves (15) at the ends abutting against the spring (11).

4. The anti-leakage three-valve group according to claim 2, characterized in that: The threaded member (12) is also provided with a serrated surface (16), and the first valve body (4) is provided with a toothed surface matching the serrated surface (16).

5. The anti-leakage three-valve group according to claim 2, characterized in that: The connection assembly further comprises an end cover member (17) threadedly connected to the threaded member (12); the end cover member (17) is threadedly connected to an adjustment member (18) abutting against the movable member (13); and a knob (19) is provided at one end of the adjustment member (18) away from the movable member (13).

6. The anti-leakage three-valve group according to claim 2, characterized in that: One end of the second fixing member (10) abuts against the inner wall of the threaded member (12) and is provided with a sealing ring (20).

7. The anti-leakage three-valve group according to claim 1, characterized in that: The second fixing member (10) is a Z-shaped structure; one end of the second fixing member (10) is fixedly connected to the second valve body (5) via a bolt assembly (21), and the other end of the second fixing member (10) is in contact with the spring (11).

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